Which are the causes of Sensory Processing Disorder?

Sensory Processing Disorder (SPD) does not have one singular, universally identified cause, but is currently understood as a complex neurobiological condition likely resulting from a combination of genetic, prenatal, and environmental factors. Research suggests that Sensory Processing Disorder involves differences in how the central nervous system receives, organizes, and responds to sensory information from the environment.

What causes Sensory Processing Disorder?

The exact etiology of Sensory Processing Disorder remains under active investigation. Rather than a single "broken" gene, researchers believe that Sensory Processing Disorder arises from subtle variations in brain architecture and neurochemistry. Think of the brain as a busy airport: in individuals with Sensory Processing Disorder, the air traffic control system (the brain) struggles to prioritize and route incoming sensory "flights," leading to either sensory overload or a lack of appropriate response.

Is there a genetic component to Sensory Processing Disorder?

Genetic research indicates that Sensory Processing Disorder often runs in families, suggesting a strong hereditary predisposition. While no single gene has been definitively linked to all cases, clinical studies suggest:

• Evidence of familial clustering, indicating that siblings of children with Sensory Processing Disorder are at a higher risk.


• Potential involvement of genes related to neurotransmitter signaling and synaptic plasticity.


• Ongoing studies utilizing twin registries to distinguish between inherited traits and shared environmental influences.

What are the environmental and developmental risk factors?

Distinguishing between causes and risk factors is vital. A cause creates the condition, while a risk factor increases the likelihood of its development. Known risk factors for Sensory Processing Disorder include:

• Prematurity or very low birth weight.


• Prenatal exposure to certain substances or maternal stress.


• Early childhood environmental factors, such as limited sensory stimulation or, conversely, highly chaotic environments during critical periods of brain development.

What does current research say about the etiology?

Modern neuroimaging studies are providing new insights into the biology of Sensory Processing Disorder. Researchers have observed differences in the white matter connectivity—the "wiring"—of the brain in children with the disorder. These findings help validate that Sensory Processing Disorder is a distinct neurobiological condition rather than a behavioral choice.

Next steps

• Consult with an Occupational Therapist (OT) certified in Sensory Integration therapy to develop a personalized sensory diet.


• Join our community of 18 members at DiseaseMaps.org to share experiences and coping strategies.


• Keep a detailed "sensory log" to identify specific triggers that lead to dysregulation.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always consult with your physician regarding your specific health needs.

References

• STAR Institute for Sensory Processing Disorder (SPDStar.org)


• NIH Genetic and Rare Diseases Information Center (GARD)


• National Library of Medicine (PubMed): Neuroimaging studies on sensory processing


• Journal of Neurodevelopmental Disorders: Research on sensory processing patterns